Washington: More than three-quarters of a million doses of swine flu vaccine for infants and children were recalled Tuesday in the United States after routine tests showed they had lost potency.
But children less than 10 years old who have only received one dose of vaccine so far should still receive a second, booster dose, the CDC cautioned.Clinical trials have shown that children under 10 need two doses of swine flu vaccine, while older children and healthy adults show a robust immune response with one dose.The recalled vaccines all met manufacturer and US federal government standards for purity, potency and safety at the time of shipping. The drop in potency was found by Sanofi Pasteur in routine testing conducted after the vaccines had been distributed to health care providers.
Sanofi Pasteur is still trying to work out what caused antigen levels in the vaccines to fall.The recall only affects injectable vaccines for infants and children under three years; no potency drop has been found in vaccines for older children and adults.Bureau Report
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